124 lines
4.1 KiB
C
124 lines
4.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Tracepoint definitions for the s390 zcrypt device driver
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*
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* Copyright IBM Corp. 2016
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* Author(s): Harald Freudenberger <freude@de.ibm.com>
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*
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* Currently there are two tracepoint events defined here.
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* An s390_zcrypt_req request event occurs as soon as the request is
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* recognized by the zcrypt ioctl function. This event may act as some kind
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* of request-processing-starts-now indication.
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* As late as possible within the zcrypt ioctl function there occurs the
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* s390_zcrypt_rep event which may act as the point in time where the
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* request has been processed by the kernel and the result is about to be
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* transferred back to userspace.
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* The glue which binds together request and reply event is the ptr
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* parameter, which is the local buffer address where the request from
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* userspace has been stored by the ioctl function.
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*
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* The main purpose of this zcrypt tracepoint api is to get some data for
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* performance measurements together with information about on which card
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* and queue the request has been processed. It is not an ffdc interface as
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* there is already code in the zcrypt device driver to serve the s390
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* debug feature interface.
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM s390
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#if !defined(_TRACE_S390_ZCRYPT_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_S390_ZCRYPT_H
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#include <linux/tracepoint.h>
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#define TP_ICARSAMODEXPO 0x0001
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#define TP_ICARSACRT 0x0002
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#define TB_ZSECSENDCPRB 0x0003
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#define TP_ZSENDEP11CPRB 0x0004
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#define TP_HWRNGCPRB 0x0005
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#define show_zcrypt_tp_type(type) \
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__print_symbolic(type, \
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{ TP_ICARSAMODEXPO, "ICARSAMODEXPO" }, \
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{ TP_ICARSACRT, "ICARSACRT" }, \
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{ TB_ZSECSENDCPRB, "ZSECSENDCPRB" }, \
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{ TP_ZSENDEP11CPRB, "ZSENDEP11CPRB" }, \
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{ TP_HWRNGCPRB, "HWRNGCPRB" })
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/**
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* trace_s390_zcrypt_req - zcrypt request tracepoint function
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* @ptr: Address of the local buffer where the request from userspace
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* is stored. Can be used as a unique id to relate together
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* request and reply.
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* @type: One of the TP_ defines above.
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*
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* Called when a request from userspace is recognised within the ioctl
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* function of the zcrypt device driver and may act as an entry
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* timestamp.
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*/
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TRACE_EVENT(s390_zcrypt_req,
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TP_PROTO(void *ptr, u32 type),
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TP_ARGS(ptr, type),
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TP_STRUCT__entry(
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__field(void *, ptr)
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__field(u32, type)),
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TP_fast_assign(
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__entry->ptr = ptr;
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__entry->type = type;),
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TP_printk("ptr=%p type=%s",
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__entry->ptr,
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show_zcrypt_tp_type(__entry->type))
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);
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/**
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* trace_s390_zcrypt_rep - zcrypt reply tracepoint function
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* @ptr: Address of the local buffer where the request from userspace
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* is stored. Can be used as a unique id to match together
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* request and reply.
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* @fc: Function code.
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* @rc: The bare returncode as returned by the device driver ioctl
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* function.
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* @dev: The adapter nr where this request was actually processed.
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* @dom: Domain id of the device where this request was processed.
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*
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* Called upon recognising the reply from the crypto adapter. This
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* message may act as the exit timestamp for the request but also
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* carries some info about on which adapter the request was processed
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* and the returncode from the device driver.
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*/
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TRACE_EVENT(s390_zcrypt_rep,
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TP_PROTO(void *ptr, u32 fc, u32 rc, u16 dev, u16 dom),
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TP_ARGS(ptr, fc, rc, dev, dom),
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TP_STRUCT__entry(
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__field(void *, ptr)
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__field(u32, fc)
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__field(u32, rc)
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__field(u16, device)
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__field(u16, domain)),
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TP_fast_assign(
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__entry->ptr = ptr;
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__entry->fc = fc;
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__entry->rc = rc;
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__entry->device = dev;
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__entry->domain = dom;),
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TP_printk("ptr=%p fc=0x%04x rc=%d dev=0x%02hx domain=0x%04hx",
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__entry->ptr,
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(unsigned int) __entry->fc,
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(int) __entry->rc,
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(unsigned short) __entry->device,
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(unsigned short) __entry->domain)
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);
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#endif /* _TRACE_S390_ZCRYPT_H */
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/* This part must be outside protection */
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#undef TRACE_INCLUDE_PATH
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_PATH asm/trace
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#define TRACE_INCLUDE_FILE zcrypt
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#include <trace/define_trace.h>
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